Connecting plttg



Patented Dec. 27, 192.7.

UNITED STATES ERNEST E. YALXLEY, OF CHICAGO, ILLINOIS.

CONNECTING PLUG.

Application filed May 26, 1924. Serial No. 716,003,

My invention relates to connecting plugs and to circuit connecting clipswhich may be employed to forni parts of the plugs, these clips servingto receive other plugs that constitute the terminals of conducting cordsthat are to be electrically connected with the plug contacts. The plugof my invention in cludes a tubular handle enclosing the clip or clipsthat are included in the plug struc- ]0 ture for the purpose ofreceiving the plug ends of the conducting cords. This handle isfurnished with an internal shoulder at its heel to engage the heel ofthe terminal plug of a cord while this terminal plug is still receivedin the plug clip, whereby accidental separation of this clip and cordplug is prevented.

The clip of my plug, itself, includes novel characteristicsindividually7 and in association with a complemental clip if the plugemploys both tip and sleeve contacts. The clip of my invention includesa base plate and a leaf spring assembled with the plate, this leafspring having a portion upon one side of the plate and being curled overthe opposite side of the plate to provide a socket for receiving theterminating plug of a Cord. iVhenever such a terminating plug isreceived in a clip socket, thus provided,

and leaf spring since the pressure exerted by the inserted plug tends tobring the plate and spring more firmly into assembly or at least doesnot tend to separate these parts. The foregoing and othercharacteristics of my invention will be described in connection with theaccompanying drawingl in which Fig. 1 is a longitudinal sectional viewof a plug constructed in accordance with the preferred embodiment of theinvention; Fig. 2 is a view taken at right angles to the direction inwhich Fig. 1 is taken, this figure showing the plug mainly in sectionand partially in elevation; Fig. 3 is a sectional view on line 3 3 ofFig. 1; Fig. 4 is a sectional view on line 4 4 of Fig. 1; Fig. 5 is asectional view on line 5 5 of Fig. 1 and Fig. 6 is a perspective viewillustrating the preferred formation of the plate entering into theconstruction of one of the clips.

The plug illustrated includes a metallic tip contact 1 and a metallicsleeve contact 2 which surrounds and is spaced apart from the tip shank3 that is screwed into body 1. The adjacent ends of the contacts l and 2are there is no tendency to separate the plateseparated by any suitableform of spacer 4. The sleeve contact 2 has a heel or body portion 2which is exteriorly threaded to receive the hollow plug handle 5 that isscrewed thereon, this hollow plug handle being of insulation. The plugcontacts 1 and 2 areelectrically and mechanically assembled with themetallic base plates 6 and 7, having overlapping angular ends 6', 7',the end 7 having an engagement with the sleeve heel to constitute anelectrical continuation of the sleeve. A spacer 8 of insulation isinterposed between said angular plate ends, the parts G', 7 and 8 beingclamped together by the tip shank 3 when this tip shank is screwed homein the tip 1. The portions of the base plates 6 and 7 which extendlongitudinally of the plug have leaf springs 9 and 10 assembledtherewith against broad faces thereof by means of rivets l1 which arepreferably formed of partially punched out portions of metal of the baseplates, which portions are thereafter headed over in fastening the leafsprings in place. The leaf springs are curled over the opposite broadfaces of the plates from where the springs are riveted to thc plates toconstitute sockets 12 designed to receive the connecting plugs 13 thatconstitute the terminals of cords 14 which are to be connected with themain plug contacts 1 and 2. The sockets 12 are faced b v the plates 6and 7 respectively. The leaf springs 9, 10 have U-shaped folds 9', 10which are located abreast of the sockets 12 to make said socketssufficiently resilient and permit them to be readily flexed from saidplates by said plugs. In placing the plugs 13 into connection with thesockets 12, the hollow plug handle 5 is unscrewed to aord access to theclips that are to receive the plugs 13. lVhen the plugs 13 have beenengaged in these clips the handle 5 is screwed into place. This handleis formed with or is otherwise provided with an internal shoulder 15 atits heel so placed as to be engaged by the heels of the plugs 13 whilethese plugs are still engaged by the clips into which such plugs werepreviously inserted, whereby accidental separation of the plugs 13 fromthe clips receiving them is prevented.

The plug shank may be locked from turning by partially splitting theangular end of one of the base plates as indicated in Fig. 6, no

the parte ot the plate enel which margin the Slot formed by thesplitting being relatively Warped so as to occupy dilferent planesbefore the tip shank is screwed home. When the screw or tip shank iescrewed home. these Warped parte et the clip plate are forced into the.fame plane and serve, clue to the resilience of the spring metal ofwhich the clip plete is formed, to hold the plug shank from turning. Theclip plc. are prevented from turning with resectto each other by meansof protubereiieee l@ which are Stamped from the plate end 6 into theinsulating Spanier 8. This spacer has :i flattened eide which engagesthe longitudinel portion of the e ip plete 7 to prevent thie Clip pletefrom turning with respect to lthe spacer and es this spacer een not turnwith respect to the plate 6, @Wing to the formutee tions 16, the twoclip plates are held from relative rotation.

Changee may loe made Without departing from the invention.

Having thus described my invention, l claim:

The combination with a bese plete; of e leaf spring having a, midportion riveted against one broad falce out said plate ei'irl having itsend portions curled over the opposite broad fece oit Seid plete1 theseleali Spring eiii'l portions forming, with seid bese plate pluri'receiving' Sockets, seid leef spring having liepefl 'telde thereinlocated abreast oct eid eocles.

ln Witness; whereot7 l hereunto subscribe my naine.

ERNEJT E. YELEY.

